devonian carbonate play, page-12

It does sound exciting.Dreams do come true from time to time.I, and ( and probably a heap of other ctp-ites) would love to know is this. How can JH come out and say we have 5.8 bb's of oil or gas or a combination of both. How can ctp estimate like that? Have they already drilled this devonian carbonate play before ctp listed on ASX? Or is the seismic tech we now have that good, like being able to spot a flea on the back of a rhino at 500 metres!!? Or a combo of both and other things beyond the ordinary guy's comprehension??